Fedora is redhat...
redhat ran from version 1 - 9 as a single OS,
after version 9 redhat split the development into two parts.
fedora and the enterprise versions.
Fedora is released for free, and is generally the *next step* for the server OS. that is to say that the nwest features are *generally* road tested in Fedora.
Fedora is now up to version 4...
Basically that means that Redhat Linux 9 is now 4 versions behind, as fedora 4 can really (to all purposes) be thought of as redhat linux 13.
You'll find it quite hard to find rehat 9 because it's so many versions behind...
however, let me know if you still realy really want it, as I have a copy and can make some ISOs for you.
heavily recomend you just use fedora though.